{{Short description|Small near-Earth asteroid}} {{Infobox planet | minorplanet = yes | name = 2020 JJ | background = #FFC2E0 | image = 2020JJ-orbit.png | image_size = | caption = Orbit of 2020 JJ | discovery_ref = <ref name="MPC-object" /> | discoverer = [[Mt. Lemmon Survey]] | discovery_site = [[Mount Lemmon Observatory|Mt. Lemmon Obs.]] | discovered = 4 May 2020 | mpc_name = 2020 JJ | alt_names = | mp_category = [[List of Apollo asteroids|Apollo]]{{·}}[[Near-Earth object|NEO]] | orbit_ref = <ref name="jpldata" /> | epoch = 31 May 2020 ([[Julian day|JD]] 2459000.5) | uncertainty = 7 | observation_arc = 0 day | aphelion = 2.1425 [[Astronomical unit|AU]] | perihelion = 0.8708 AU | semimajor = 1.5067 AU | eccentricity = 0.4220 | period = 1.85 [[Julian year (astronomy)|yr]] (675 d) | mean_anomaly = 350.73[[Degree (angle)|°]] | mean_motion = {{Deg2DMS|0.5329|sup=ms}} / day | inclination = 11.192° | asc_node = 44.188° | arg_peri = 237.33° | moid = {{val|3.51662|e=-6|fmt=none}} AU (526 km)<ref name="jpldata" /> | mean_diameter = {{val|2.7|-|6|u=m}}<ref name=watchers/> | rotation = | albedo = | spectral_type = | abs_magnitude = {{val|29.97|0.09}}<ref name="jpldata" />{{·}}30.0<ref name="MPC-object"/> }} '''{{mp|2020 JJ}}''' is a tiny [[near-Earth asteroid]] of the [[Apollo asteroid|Apollo group]] that passed {{convert|7000|km|mi}} from the surface of Earth on 4 May 2020. It is estimated to be between 3 and 6 meters in diameter.<ref name=watchers>[https://watchers.news/2020/05/04/asteroid-2020-jj/ Asteroid 2020 JJ flew past Earth at just 0.03 LD on May 4 -- the closest of the year and 6th closest on record] 4 May 2020</ref>
== Orbit and classification == 2020 JJ orbits the Sun at a distance of 0.9–2.1 [[Astronomical unit|AU]] once every 1 years and 10 months (675 days; [[semi-major axis]] of 1.51 AU). Its orbit has an [[orbital eccentricity|eccentricity]] of 0.42 and an [[orbital inclination|inclination]] of 11[[Degree (angle)|°]] with respect to the [[ecliptic]].<ref name="jpldata" />
== Flyby== On 4 May 2020, it passed 7,000 km above the southern [[Pacific Ocean]].<ref>{{cite tweet|number=1257423820627083264|user=tony873004|title=A few hours ago, newly-discovered asteroid C2QQFV2 passed only 7000 km above the South Pacific Ocean. It was in Ear...<!-- full text of tweet that Twitter returned to the bot (excluding links) added by TweetCiteBot. This may be better truncated or may need expanding (TW limits responses to 140 characters) or case changes. --> |date=4 May 2020}}</ref> It was the closest since {{mpl|2019 UN|13}} on 31 October 2019.<ref name=watchers/> {| |[[File:2020_JJ-hoverview.png|640px]] |- |2020 JJ flyby with 1 minute markers, flying left to right. Red shows Earth's shadow. |}
== See also == *[[List of asteroid close approaches to Earth in 2020]]
== References == {{reflist|30em|refs=
<ref name="jpldata">{{cite web |type = 2020-05-04 last obs. |title = JPL Small-Body Database Browser: (2020 JJ) |url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=54016959;cad=1 |publisher = [[Jet Propulsion Laboratory]] |accessdate = 5 May 2020}}</ref>
<ref name="MPC-object">{{cite web |title = 2020 JJ |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=2020+JJ |accessdate = 5 May 2020}}</ref>
<!-- <ref name="AstDys-object">{{cite web |title = Asteroid 2020 JJ – Proper Elements |publisher = AstDyS-2, Asteroids – Dynamic Site |url = https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=2020+JJ |access-date= 5 May 2020}}</ref>-->
}} <!-- end of reflist -->
== External links == * {{AstDys|}} * {{JPL small body|id=54016959}}
{{2020 in space|state=collapsed}} {{Authority control}}
{{DEFAULTSORT:2020 JJ}} [[Category:Apollo asteroids|#]] [[Category:Minor planet object articles (unnumbered)]] [[Category:Near-Earth objects in 2020|20200504]] [[Category:Astronomical objects discovered in 2020|20200504]]
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